The. Mosuowan Structure And Evolution Of Analysis,

Mosuowan Uplift of Junggar basin possesses the special structure background of "heave in a concave".The oil and gas exploring to the shallow strata has got important discovery,but restricted by many factors the exploring to the deep strata doesn't make big progress.But these years'study shows that the middle and deep stata have huge oil and gas exploring value.The current Carboniferious top boundary is a giant anticline distributed in the northwest-southeast direction,and it's topest point which is 7070m deep is to the east of Well Pencan2,and to the south of Well Mo1 and Well Mo3.The anticline closure area is 780km ,and the closure is 1150m.The crest line extend from Well Mol to the direction of Well Fang2.Affected by Hercynian movement and Yanshan movement,two rift systems—the shallow rift system and the deep rift system take shapes.The rift system with NW-trend is the main factor leading to the forming of the Carboniferious top boundary giant anticline,and the rift system with NE-trend which takes shape after the forming of Mosuowan anticline is the main passage of the oil and gas immigration from the oil-generated Permian concave of west of WellPenlto Mosuowan heave.The rift system with NW-trend forming at the top part of Mosuowan anticline is the main passage of deep oil and gas immigration.Tectonic movement cause to many unconformities.In Mosuowan area,there are 14 unconformity surfaces.The P_1j strata are onlap at the wing parts of Mosuowan anticline and disappear there;The J_2x strata are cut and lost at the top part of Mosuowan anticline.The study to the Mosuowan ancient structure indicate that Mosuowan Uplift structure evolution experiences the six stages—Carboniferious preliminary uplift stage,Permian uplift development stage,Triassic—Middle Jurassic early stable burial stage,Middle Jurassic—Late Jurassic compress—shear remoulding stage,Cretaceous—Lower Tertiary stable burial and adjustment stage and Upper Tertiary shaping stage.During the process of structure evolution, the closure and closure area of Carboniferious top boundary are largened,and the range of it's largening is the largest in Eogene.The evolution tendency of P_2x and P top boundaries are similar, but their closure and closure area are diminished from Cenozoic.